Prime-Line D 1518 Prime-Line Concave Edge Sliding Door Assembly, 1-1/4 in Diameter X 5/16 in W, 1 Roller, Brass Product Description This patio door roller is constructed from steel. It comes affixed to an adjustable steel housing assembly and replaces old-style extruded aluminum rollers. This style roller assembly is used on International and similar styled glass doors. From the Manufacturer This patio door roller is constructed from steel. It comes affixed to an adjustable steel housing assembly and replaces old-style extruded aluminum rollers. This style roller assembly is used on International and similar styled glass doors. Features Used by International Windows Corporation and a variety of other sliding patio door manufacturers K-tab style housing 1-1/4 in. diameter concave steel roller Stamped steel housing with ball bearing roller Features rear screw adjustment Used on metal framed sliding patio doors USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.